Data Archive of Mid-21st Century Projections for the Amundsen Sea (Western Antarctica)

A 3-D numerical model was used for multi-decadal eddy-resolving simulations of the Amundsen Sea embayment (Antarctica). A control simulation covered the historical period 2006-2023 (~2 decades) under realistic atmospheric and oceanic conditions. Three additional simulations representing the mid-21st century were conducted based on future projections from CMIP6 models ACCESS-CM2, MPI-ESM1-2-HR, MRI-ESM2-0 (scenario SSP2-4.5). These three CMIP6 models were selected based on their realism during the historical period as well as their diversity in terms of resolution and level of warming. The four simulations provided information about the regional hydrography, oceanic circulation, sea ice cover, ice shelf basal melt rates, and biogeochemical conditions (nitrogen and iron). The four simulations were then condensed into daily climatologies in order to summarize changes in the seasonal cycle of the Amundsen embayment in response to the projected warming. The present archive includes the four daily climatologies as well as all the information required to repeat the numerical experiments (code and input files).